Radeon R9 nano on cMP. Is it doable?

Discussion in 'Mac Pro' started by Xanix, Feb 18, 2016.

  1. Xanix, Feb 18, 2016
    Last edited: Feb 18, 2016

    Xanix macrumors member

    Oct 10, 2011
    Hi. Does anyone have tried a R9 nano and got it working, on OS X?
    I'm really impressed by this card and I was thinking, on buying 2 cards, to get crossfire on Windows.

    Option 1:
    Buy a modded (MAC EFI) GTX 980 Ti (250 TDP)
    Install the nVidia/Cuda drivers on OS X and forget about it.

    Option 2:
    Get 2 x R9 nano (175 TDP) + (175 TDP)
    Connect card 1 to motherboard (175 TDP).
    Connect card 2 to 2 hard drives power (175 TDP).
    One card for OS X; Crossfire on Windows.

    I don't care about the "Boot Screen", BootChamp can do the job. I just need to know, if OS X Mavericks/Yosemite/El Capitan work with the R9 nano.

    Anyone tried it? Any feedback about (IF) is recognisable, on OS X?

    Kind regards,

    *I only have Mavericks on Software RAID 1 | Windows 8.1 on Software RAID 1
  2. netkas macrumors 65816

    Oct 2, 2007
    Mods, isn't this against forum rules to discuss pirated software?
  3. Xanix, Feb 18, 2016
    Last edited: Feb 18, 2016

    Xanix thread starter macrumors member

    Oct 10, 2011
    Pirated software?!? I found it (the card), from a Apple dedicated eBay seller, located in Europe; isn't this the same, as MacVidCards eBay store, from US?

    Maybe there's something more going on, that I don't know but, If there's something wrong, let me know; I'll erase that part of the post, immediately!


    *I've updated and erased the post. Let me know what's going on...
  4. h9826790 macrumors G4


    Apr 3, 2014
    Hong Kong
    An Apple dedicated ebay seller selling a Mac EFI 980Ti?

    MVC develop the EFI on his own. Therefore, it's not piracy.

    And so far, no other people did the same thing, all Mac EFI 980Ti not from MVC are
    1) 2nd hand card which originated from MVC
    2) Steal the ROM from MVC's 980Ti and flash it onto other cards (piracy)
    3) The card has no Mac EFI at all, the seller lie
  5. bokkow macrumors 6502


    May 3, 2012
    The Netherlands
    I agree that this hurts your business and efforts Netkas and/or MVC. However, clearly the topic starter is not aware of the underlying situation so you could bring this a bit more friendly...

    Xanix: MVC, Netkas and members of the Netkas forum put a lot of effort in developing EFI bios for these cards. The ebay sellers located in Germany that offer "flashed" GPU's just rip the EFI bios and put it on another card and thus making money out of pirated software. Without any real knowledge so if anything is corrupted they wouldn't have a clue where to look for support.

    The thing is, for Europeans, that buying from MVC is quite expensive because of import tax and additional shipping. I once made a calculation on MacRumors somewhere which showed that importing a MVC GTX 980 due to taxes would cost 25-30% more. So this is why these pirates seem attractive, sadly.

    On topic:
    I think it is no problem to put two R9 Nano's in a Mac Pro. @h9826790 has experience with two AMD cards in his system, maybe he would want to share how he powered these? And how they behave in terms of crossfire in Windows / dual GPU computing in OSX?
  6. Fl0r!an macrumors 6502a

    Aug 14, 2007
    OS X doesn't have full Fury drivers (yet?), so it'll be Windows-only in best case.
  7. MacVidCards Suspended

    Nov 17, 2008
    Hollywood, CA
    And MVC has a legit European partner now, just getting up to speed.

    So you can save the 20-30% and still get solid cards with correct rom and our full support.

    I tried Nano in 10.11.3, no go.
  8. h9826790 macrumors G4


    Apr 3, 2014
    Hong Kong
    In terms of power, that's relatively easy on the 7950. Regardless what's the TDP of the card, the non OC card only draw around 140W under normal max (around 170W with Furmark). This is base on stock setting ~1.094V, 800/1250MHz. So, lower the voltage to 0.956V (I'd try the minimum stable voltage on both of my 7950, it's actually around 0.9V, so 0.956V give plenty of buffer already. And this is the minimum voltage that allow the card to be further adjust voltage in Afterburner under Windows), this can easily lower the card' power draw to below 125W normal max. In fact, 0.956V already allow you to OC the card a little bit (stablely).

    So the card will draw around 40-50W via the PCIe slot, and another 75-85W from the 2x 6pins. Since the 6pins on the logic board can gives out 75W safely (the self shutdown protection will kick in at about 120W). Assuming both card will draw power in similar manner. I now connect them as follow.

    Source A -> (mini 6pin to 2x 6pin cable) -> one 6pin to card A and the other to card B
    Source B (same as source A).

    And then do some quick test in Luxmark will tell if you do it correctly. If you do it right, both source will supply around 75-85W. If you do it wrong, one cable will draw power more than the other (if this happen, shutdown, don't touch the mini 6pin port, just swap one of the 2x 6pin between card A and B, this will balance the power draw).

    My old setup was connect one source to one card, that's good for OpenCL (e.g. FCPX), and Corssfire in Windows. However, Crossfire is not always work, and in OSX, OpenGL only work on one card as well. So I now share each card's loading between 2 sources. Which give me the ability to OC the primary card (by software) in Windows when I don't / can't use both card at the same time.

    I didn't read the Nano's review yet. If 175W is the Furmark power draw, then it's totally possible to power both Nano by only the 2x 6pin power source (depends on the card draw how much power from the PCIe slot). I personally won't recommend anyone let a 175W card draw power from 2x SATA port. The SATA port provide up to 55W, however, I doubt if the card really draw 75W from the PCIe slot. If it only draw 35W from the slot, another 140W from the cable, then you are drawing 70W from each SATA port. I don't mind to draw a bit more from the 6pins, they are designed to supply power only, and clearly we know the shutdown protection is there, and will kick in at about 120W. But for the SATA port, we have no idea what's the build in buffer, and if there is any proper protection.

    Assuming I will only kill the port but not the whole logic board by drawing too much power. I prefer to kill the mini 6pin. There is an easy work around to draw power from the PSU again by doing the Pixlas mod. But once I kill the SATA port, that's done, no work around.
  9. Xanix thread starter macrumors member

    Oct 10, 2011
    Hello to all. Thank you for taking the time, and explain me, the situation. I didn't knew that sellers were using bios, developed from MVC and Netkas, to sell cards.

    So, about the R9 nano; right now, is a no go situation! I think i'll wait and pray, that Apple upgrade de nMP with "Fiji" chips.

    MacVidCards, can you pm me the contact, of you're European partner? If I go the nVidia route, I could buy from them.

    I've also looked to that "Pixlas mod". Could work and it's a mod I think I can do, without dificulty. Only need to buy the cables and the splice clips.

    Thank you and regards,

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